// Copyright Octelium Labs, LLC. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package deviceinfo

import (
	"context"
	"os/exec"
	"strings"

	"github.com/pkg/errors"
)

func getSerialNumber(ctx context.Context) (string, error) {
	out, err := exec.Command("/usr/sbin/ioreg", "-l").Output()
	if err != nil {
		return "", err
	}
	for _, l := range strings.Split(string(out), "\n") {
		if strings.Contains(l, "IOPlatformSerialNumber") {
			return doTrim(l), nil
		}
	}

	return "", errors.Errorf("Could not find serialNumber")
}

func doTrim(l string) string {
	kv := strings.Split(l, "=")
	if len(kv) != 2 {
		return ""
	}
	s := strings.TrimSpace(kv[1])
	return strings.Trim(s, `"`)
}
